Plaster-board.



DE LANCE-Y A. CAMERON.

PLASTEP. BOARD.

APPLICATION FILED MAY 20, 1911.

1,129,637. Patented Feb. 23, 1915.

DE LANCEY A. CAMERON, OF GENESEO, NEW YORK, ASSIGN'OR TO DELAC PLASTER ('10., OF MUMFOBD, NEW YORK, A CORPORATION OF NEW YORK.

PLASTER-BOARD.

tain new and useful Improvements in Plastor-Boards, of which the following is a specification.

This invention relates to boards of plasticcompositi'on, such as are employed in buildings in place of plaster spread upon lathing.

It has been previously proposed to employ reinforcements of wire netting in plasterboards as, for example, in my own prior ap plication filed August l, 1909, Serial No. 511,209, but it has been found that such rein forcements'do not sufliciently strengthen the edges of the boards, so that when the boards are carelessly handled, or when they are being nailed in place, these edges tend to crack and to crumble away, particularly around the nails.

' One object of the'present invention, therefore, is to produce a plasterboard in which the edges are strengthened by a reinforcement of peculiar form, this reinforcement is secured in place,

extending along, and being substantially coextensive with, the edges, while the remainder of the plaster-board. may be constructed and reinforced in any usual or suitable manner.

A further object of the invention is to provide for cooperation between this marginal reinforcement and the nails, or other fastening devices by which the plaster-board and to this end 1 provide the marginal reinforcement with nailengag ing eyes, and also provide indications upon the face of the plaster-board to designate the positions of these eyes, so that the nails may be properly engaged therewith.

Other objects and features of the invention will be set forth in connection with the following description of the illustrated embodiment thereof.

In the accompanying drawings: Figure l is a front-elevation of a plaster-board embodying the present invention, with a portion shown in section to reveal the interior construction; and Fig. 2 is a vertical section, on a larger scale, on the line 2-2 in Fig. 1.

The plaster-board illustrated in the drawings is' of the usual general form, being rectangular and of uniform thickness, and

Specification of Letters Patent.

Patented Feb. 23, 3915.

Application filed May 20, 1911. Serial No, 628,568.

of such dimensions that when applied to the studding of a building it will extend across two of the spaces between adjacent studs.

Obviously the dimensions and proportions of the board may be varied at will, however. The composition of the body 3 of the board is not an essential feature of the present invention, but it preferably includes a plastic base, such as plaster of Paris, mingled with fiber and with saw-dust or other filling material. A suitable composition for this purpose is disclosed in my application hereinbefore referred to. The board is preferable formed with a smooth face i, which requires no further finishing except the application of paint or wall-paper, or other coating.

The body of the board is reinforced in the usual manner by means of light wires in the form of netting. As illustrated, this bodyreinforcement comprises horizontal straight wires 5 and connecting wires 6 wound about the wires 5. I find this form of netting to be particularly effective as it affords wires extending directly between the studs so as to directly resist strains ina horizontal direction. This netting is embedded in the body of the board in the process of manufacture.

The present invention resides particularly in the novel manner in which the marginal portions of the board are reinforced. For this purpose I employ a comparatively heavy wire 7 which is embedded in the body close to, and substantially parallel with, the edges of the board. This wire has, therefore, a generally-rectangular form, and its ends 8 are joined in any convenient manner as, for example, by twisting them together. Obviously this rectangular reinforcement may be coextensive with the entire board, thus producing a single integral panel, but for convenience in dividing the board when necessary the marginal reinforcement is preferably made in two or more rectangular sections, as shown in'l ig. 1, so as to divide the boards into two or more panels and produce a diametral space 12 in which the board may be out without the necessity of severing the wire 7. As this diametral space comes at the point where the board engages a stud when the board is used without division, it is not necessary that the board he as strong at this point as at intermediate portions. The netting by which the seat itself without such recess;

body of the board is reinforced may be connected at intervals withthe marginal reinforcement, although this is not essential As shown in'Fig. 1, the ends of some of the horizontal Wires 5 are twisted about the wires 7.

In order that'the marginal reinforcements may serve not only to strengthen the edges of the boards,-but also as anchorages for the nails by which the board is'fixecl in place, the wire 7' is provided at intervals with looped portions 9 forming eyes through which the nails may be driven. These eyes are located at the corners ofthe board and also at'the vertical'diameter where the board is nailed to an intermediate stud. In order to insure the driving of the" nails at the proper points to engage the-eyes, the surface of the board is m'arked insonie way, and this may be done conveniently by providing a perforation 10 in the bod y'registering-with each eye. This perforation also facilitates the driving of the nails and reduces the liability of splitting-in consequence, although it is not necessary for this purpose if the body is suitably strengthened with fiber. On the face of the board the; perforation may have an enlarged portion 11 to receive the nail-head, although this also is not essential as the composition" may be suffrciently yielding to permit the nail-head to For the further reinforcement of the "board, and

- also to provide intermediate nail-anchorages on the vertical edges, I employ additional reinforcing wires 13 which are formed as directly from one sthdlto'the next, being secured firmly to each stud by; nails or'oth'er fastenin'gs; For this reason any tendency" to f relative movement inthe studs s; resisted.

Without strain upon the body of the -board; so that-thefralne of thebuildin'g is stiffened,

while pulling apart of the edges of the boards at the joints is effectually prevented.

This feature makes the board particularly valuable for'outside use as .well as inside use.

Y My invention is not limited to the enibodiment thereof hereinbefore described and illustrated in the accompanying drawings,

but may be embodied in 'variou'sforms Within'th'e vnature'of the" invention as it is defined in the following claims.

1. A? plaster board having,- in combina-' tion, a rectangular body of plastic composition, and reinforcements embeddedthere' in and comprising wires arranged 'contin. uously' in substantially rectangular form, each reinforcement extending along, close to, and parallel with, at least two edges of the body and thence through the body close to and parallel with a diameter ofthe body, so that the body-may be divided into a plurality ofsimilar rectangular panels having continuous marginal reinforcements.

2.-A plaster-board having, in combina-.

tion, a rectangular body of plastic composition, and reinforcements embedded therein and comprising wires arranged insubstantially rectangular form, each reinforcement extending along, close to, and parallel with, at least two edges of the body and thence through the body close to and parallel with a diameter thereof, so that the body may be divided. into a plurality of similar rectangular panels having continuous marginal reinforcements, said reinforcements being provided, at their exterior and interior corners, with nail-receiving anchorages.

DE LANCEY A CAMERON.

Witnesses FARNUM F. Donsnr, D. GURNEE. 

